Abstracts Book - IMRC 2018

• SB6-P015
HYDROTALCITES AS EFFECTIVE BIOCIDAL MATERIALS AGAINST
ASPERGILLUS NIGER FUNGUS
Franchescoli Didier Velázquez Herrera 1 , Geolar Fetter 1 , Vilma Rosato 2 , Andrea M. Pereyra 3 ,
Elena I. Basaldella 3
1 Benemerita Universidad Autonoma de Puebla, Facultad de Ciencias Quimicas, Mexico.
2 Universidad Tecnológica Nacional, Facultad Regional La Plata, Argentina. 3 CINDECA, CCT- La
Plata-CONICET, Argentina.
Aspergillus niger is the most common fungus of the genus Aspergillus, which
can cause health problems including allergies and asthma. Frequently, it is
found in fruits and vegetables, causing a disease called black mold. In addition,
this fungus appears on the painted surfaces of buildings producing degradation,
flaking and spalling of the coating. The typical antifungal agents, such as azoles
or allylamines need to be supported on organic or inorganic solids. However,
some inorganic solids could have antimicrobial activity by their selves, such as
the hydrotalcite clays. Hydrotalcites have shown high activity against various
microorganisms, and their activity can be attributed to metallic ions or
hydroxides liberated the structure to the microorganism medium, and then,
interfering in the bacterium metabolism and leading to a cell death. In this work,
the synthesis of hydrotalcites containing Mg, Zn and/or Cu with Al was carried
out by the co-precipitation method followed by a crystallization with
conventional heating or ultrasonic irradiation and tested against Aspergillus
niger. The biocidal capacity depended mainly on the synthesis conditions, the
composition of the hydrotalcites and the concentrations used in the
microbiological tests.
Acknowledgment:
CONACYT and VIEP-BUAP
Keywords: Layered double hydroxides, fungicides, microorganisms
Presenting authors email: geolarfetter@yahoo.com.mx